Size and resolution

The resolution of a full-sky map is governed by the parameter nside. This is also where I specify the image size used throughout this notebook.

The theoretical input power spectrum

from the CMB

from custom power spectrum

Plot

 

From angular power spectrum to map

cl = cl_cmbcl = cl_peak

 

From map to angular power spectrum

Fourier power spectrum

 

Projection to flat map

Using the pixell package as mentioned in the ACT example notebooks to project the full-sky map to a flat cut-out.

Fourier spectra

 

 

Generate Gaussian fluctuations on a flat map

Map generation

Fourier spectra

 

Compare flat projection from full-sky with flat map generation

Maps

Fourier power spectra